Emil von portiieim



UNITED STATES EMIL VON IORTIIEIM, OF PRAGUE, AUSTRIA-HUNGARY.

PRQCESSOF DYEl-NG BLACK.

. srncrrronrrou forming part of Letters Patent No. 586,865, dated any so, 1897,

Application filed May 25,1896" $9212.! No. 593,066- (No specimens.) Patentedin Austria May 6, 1896, Eta-#671,850; in

France Kay 9,, 1896,1i'o. 256,241; in England May 9,1896,No.9,912; in Italy July 3,1896,XXXI,41,535,LXXXI, 324,

and in Hungar y September 19, 18,96,110. 7,502.

To all whom it may concern! I Be it known that I EMIL VON PoRTHEIn, a subject ofithe Emperor of Austria-Hungary,

residing at Prague, in the Province of Bohemm, in the Empireof Austria-Hungary, have invented certain new and useful Improvemerits in the Process elf-Producing Black Coloring-Matters on the Fiber, (for which Letters Patent have been obtained with my consent in Austria, dated May 6, 1896, No. 46 1,850; in Hungary, dated September 19, 1896, No. 7,502; in France, dated May 9, 1896, No. 256,241; in Italy, dated Julyf3, 1896, XXXI, 41,535, LXXXI, 32-1, in the name of Kinzlberger & 00., and in my name in Eng- 1 nd, dated May 9, 1896, No. 9,912 and do he it-appertains to'inanemurnseme same? hereby declare the flollowin g to be a full, clear, and exact description of the invention, such as :will enable others skilled in the art to which The object the present invention is a process for producing black a-zo dyestufis on cotton fiber impregnated with betamaphthol sodium. These dyestuffs, produced in the "manner hereinafter described, are distinguished from all similar products known till now by the easy management of the diazotizing operation, the intensity of tints, the tinctorial power, resistance to light, and stability of the diazo compound, while the said dyestuffs are not inferior, as regards the other qualities, to all similar products and therefore fill up a void in the use of the so-called ice colors.- I

The invention is earned out by employing the diazo compounds of the amidochrys'oidins,

such as are formedfroln the diazo compound of the acetyhparaphenylcnediamin by combination thereof with metaphenylenediamin or orthoparatcluylenediami11 or a symmetrical dimethyl-metaphenylenediamin, and by disacetylization of the obtained product. The

above amidochrysoidins may, however, be

Example; 5.3 parts, by'weight, of the base of amidochrysoidin (triamidoazobenzene) are dissolved in seventy-five parts, by weight, of-

water and seven parts, by weight, of hydrochloricacid, (specific gravity 1.2.) Then forty five parts, by weight, of ice are added. The cooled mixture is then diazotized witha concentrated solution of 1.75 parts, by weight, of nitrite.

' The diazo liquor is mined with one hundred and ten parts,by weight, of acetic-starch paste. Then 5.3 parts, by weight, of oxalic acid are added to it, and, finally, beforeprinting,

2.4 parts, by weight, of acetate of sodium in form, of a concentrated solution are added.-

performed with naphthol sodium alone or with addition of any suitable fatty acid compounds.

I claim-'- 1. In a process for dyeing fibrous materials black and forming the dycstuif on the fiber itself, mordanting the same first with betanaphthol sodium and then applying thereto a diazo combination of an amidochrysoidin base.

2. In a process for-dyeing fibrous materials black and'forming the dycstulf on the fiber itself diazotizing a base of an amidochrysoidin, adding to the diazotized liquor acetic-starch paste and acetate of sodium in about the proportions set forth, and applying the compound to the fibrous material previously mordanted with beta-naphthol sodium.

3. A process for dyeing fibrous materials black and forming the dyestud on the fiberitself, by diazotizing a base ofan amidochrysoidin, adding to the diazotized liquor aceticin g the compound to the fibrous material pre viously mordanted with beta-naphthol so" dium and a fatty acid compound.

In testimony whereof I atiix my signature starch paste, oxalic acid andacetate of sodium .in" about the proportions set forth, and apply- 

